text: import sys
  import csv
  
  # import Simon's position log files (*.csv format) "Rekonstuiert_Koordinaten_X.csv"
  def import_pos(filepath):
      f = open(filepath, "r")
      csvreader = csv.reader(f, delimiter=";")
      data = [data for data in csvreader] # read in csv file as list
      data = data[1:len(data)] # discard first row which contains "X;Y;"
      pos_x = [int(x[0]) for x in data] # extract first column, x-coordinates
      pos_y = [int(y[1]) for y in data] # extract second column, y-coordinates
      f.close()
      return pos_x, pos_y
  